* @param renderers slave layers
*/
private void createComposites(List<TileRenderer> renderers) {
int size = width * height;
spriteMap = new Sprite[size];
SpriteCache cache = SpriteCache.get();
int layers = renderers.size();
List<Sprite> slaveSprites = new ArrayList<Sprite>(layers);
for (int i = 0; i < size; i++) {